AOB

Speaker : All ( All )


Talk time : 12:55, Duration : 00:05

ESL time offset fix

Speaker : Levente Hajdu ( BNL )


Talk time : 12:50, Duration : 00:05

Overview of the Year7 PWG evaluations

Speaker : James Dunlop ( BNL )


Talk time : 12:35, Duration : 00:15

Calibration for run 8, preparation, readiness, plan

Speaker : Gene Van Buren ( BNL )


Talk time : 12:15, Duration : 00:20

Calibration Status for Run VIII



Detectors

BEMC, EEMC, FMS, TPC, FTPC, VPD+TOF (pp only), PMD (dAu only), TPX (pp, dAu?)

TOF calibration status

Speaker : Xin Dong ( LBNL )


Talk time : 12:00, Duration : 00:15

Presented by Zebo Tang.

Talks Committee Criteria and Protocols

STAR Talks Committee Overview and Advice to Speakers

(Last updated August 2012)

Nessus false positives and errors

Here are the list of Nessus scan results that are marked as False Positives, Operational Need, Acceptable Risk, etc. 

EEmc Gammas via conversion method

 

Abstract:
 
We use the preshower subsytem to statistically extract single-photon yields in the EEmc.  The method is similar to that employed by CDF [1].  An isolated sample of photon candidates is identified above pT > 5.0 GeV in the endcap.  Gamma candidates with charged particles within R < 0.3 are vetoed using the 1st preshower layer.  The remaining candidates should be primarily composed of neutral particles.  Based on the differential probabilities for 1 versus 2 photons to convert in the first radiator and deposit energy in preshower-2, it is then possible to extract a photon yield.
 
What follows is a "proof-of-principle" analysis.  The biggest "trick" is determining the conversion probabilities for the signal and background events, and this will need to be investigated further to quantify systematic uncertainties.
 

Frank's Jet Blog

Inspired by Matt Walkers study I have started a Geant4 investigation of the BEMC response to various particles. A very first look is shown in the attached pdf file.

Mass Windows

The nominal mass window was chosen 'by eye' to maximize the number of pion candidates extracted while minimizing the backgrounds (see yield extraction page.)  I wanted to check to see how this

Single Spin Asymmetries

The plots below show the single spin asymmetries (SSA) for the blue and yellow beams, as a function of run index.  These histograms are then fit with flat lines.  The SSA's are consistent

Sanity Checks

Below there are links to various 'sanity' type checks that I have performed to make sure that certain quantities behave as they should

Charge Shape Study

Speaker : Jim Thomas


Talk time : 00:00, Duration : 00:20

PID Background Systematic

 

Documentation for a systematic uncertainty in the Run 5 charged pion A_{LL} based on contamination from non-pions in the PID selection window.

e/h discrimination in the Endcap

Under:
attach different analysis to this child-pages, make them self contained

Eta Systematic

For the eta background systematic we first estimate the background contribution (or contamination factor) to the signal reigon.  That is we integrate our simulated background to discern the pr

Relative Luminosity Systematic

 

Documentation for a systematic uncertainty introduced in the Run 5 charged pion A_{LL} based on uncertainties in our measurement of the relative luminosity.

Combinatoric Systematic

For the combinatoric background systematic we first estimate the background contribution (or contamination factor) to the signal reigon.  That is we integrate our simulated background to disce

Low Mass Systematic

For the low mass background systematic we first estimate the background contribution (or contamination factor) to the signal reigon.  That is we integrate our simulated background to discern t

Systematics

We need to worry about a number of systematic effects that may change our measurement of ALL.  These effects can be broadly separated into two groups: backgrounds and non background